Paint the Squares
There are various sized interactive grids up to 120, all of which are configurable. They include a regular 100 square, a negative numbers grid, decimal numbers and puzzles. Ideal for starter or plenary activity.
Maths is Fun
A useful site if you are struggling with your maths as it explains different areas of maths. You can then work through examples and answers are provided. It is an American site, with something for all age groups. There is useful maths dictionary of terms.
Maths Invaders
Shoot the spaceship with the correct answer and dodge the incoming fire. A fun game to practise a wide range of key mathematical skills. There are over a hundred carefully differentiated levels.
BBC Bitesize Maths Key Stage 2
Two learner guides and fourteen class video clips on place value and decimals.
Place Value Chart
A useful teaching tool to demonstrate place value in numbers up to millions. It includes an option for decimal numbers.
Monty's Maths Wall
A good game for practising a wide range of mathematical skills including multiplication, addition, reading numbers, subtraction, fractions of numbers, division, decimals and percentages and simplifying fractions and more.
Guardians Defenders of Mathematica
A BBC Bitesize game where you pit your wits and mathematical skills against your enemies with weapons. Mathematical areas covered include: place value, addition and subtraction, multiplication, division, fractions, decimals, algebra and more.
Times or Divide Bingo
A useful class teaching resource on division and multiplication by 10 and 100. It includes decimals and is suitable for use on an interactive whiteboard.
Abacus
Designed for use with an interactive whiteboard this is a great resource for demonstrating place value including decimals, counting, addition and subtraction.
Reading Scales
This website has activities involving reading scales. There are six levels of difficulty and the hardest include negative numbers and decimals. The scales include linear, thermometers and a variety of dials.